I personally feel that even in the worst case scenario and WF somehow short changes Superman in an even greater way then Avengers short changed all it's characters developments after their solo films(including hulk).

Then like The Winter Soldier sequel, another solo story is waiting around the corner and will a huge hype boost.

but that's worst case.

You mean DURING their solo films. Because afterward, they're still gonna get sequels. We don't know if Superman's so lucky.